Bicycle frame



FIGS. 1 and 2 are perspective views of a first embodiment of a bicycle frame (cruiser bike) of my design;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view therefor;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left-side view thereof; and,

FIG. 8 is a right-side view thereof. 

CLAIM The ornamental design for a bicycle frame, as shown and described. 